Multiple cross-site scripting (XSS) vulnerabilities in vTiger CRM 5.2.1 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) viewname parameter in a CalendarAjax action, (2) activity_mode parameter in a DetailView action, (3) contact_id and (4) parent_id parameters in an EditView action, (5) day, (6) month, (7) subtab, (8) view, and (9) viewOption parameters in the index action, and (10) start parameter in the ListView action to the Calendar module; (11) return_action and (12) return_module parameters in the EditView action, and (13) query parameter in an index action to the Campaigns module; (14) return_url and (15) workflow_id parameters in an editworkflow action to the com_vtiger_workflow module; (16) display_view parameter in an index action to the Dashboard module; (17) closingdate_end, (18) closingdate_start, (19) date_closed, (20) owner, (21) leadsource, (22) sales_stage, and (23) type parameters in a ListView action to the Potentials module; (24) folderid parameter in a SaveandRun action to the Reports module; (25) returnaction and (26) groupId parameters in a createnewgroup action, (27) mode and (28) parent parameters in a createrole action, (29) src_module in a ModuleManager action, (30) mode and (31) profile_id parameters in a profilePrivileges action, and (32) roleid parameter in a RoleDetailView to the Settings module; and (33) action parameter to the Home module and (34) module parameter to phprint.php.
Conclusion & alert: CVE-2011-4670 is rated High Exploit Risk (71.2/100): CVSS Medium severity, with high exploitation likelihood (EPSS 36.15%, 97th percentile). Core evidence: 5 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +18.61% over the last day, indicating growing attacker interest. Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| 36204 | exploit_db | edb | 2011-10-04 | Exploit-DB ↗ |
| 36203 | exploit_db | edb | 2011-10-04 | Exploit-DB ↗ |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-03-03 | 17.54% | 36.15% | +18.61% |
| 2 | 2025-10-23 | 15.39% | 17.54% | +2.15% |
| 3 | 2025-08-02 | — | 15.39% | — |
Full EPSS history (13 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| vtiger | vtiger_crm | <= 5.2.1 | cpe:2.3:a:vtiger:vtiger_crm:*:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| http://osvdb.org/76005 | Broken Link |
| http://osvdb.org/76006 | Broken Link |
| http://seclists.org/fulldisclosure/2011/Oct/154 | Exploit Mailing List Third Party Advisory |
| http://www.securityfocus.com/archive/1/519993/100/0/threaded | |
| http://www.securityfocus.com/bid/49927 | Exploit Third Party Advisory VDB Entry |
| http://yehg.net/lab/pr0js/advisories/%5BvTiger_5.2.1%5D_XSS | Exploit |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/70306 | Third Party Advisory VDB Entry |
| https://www.exploit-db.com/exploits/36203/ | Third Party Advisory VDB Entry |
| https://www.exploit-db.com/exploits/36204/ | Third Party Advisory VDB Entry |